Answers

The host 0888502e-bb3b-4d29-b08e-eee8616e1d0d._msdcs.docencia.ucr.ac.cr
could not be resolved to an
IP address. Check the DNS server, DHCP, server name, etc
Although the Guid DNS name
(0888502e-bb3b-4d29-b08e-eee8616e1d0d._msdcs.docencia.ucr.ac.cr)
couldn't be resolved, the server name (server.docencia.ucr.ac.cr)
resolved to the IP address (10.3.18.2) and was pingable. Check that
the IP address is registered correctly with the DNS server.
......................... SERVER failed test Connectivity

Testing server: Default-First-Site-Name\SERVER
Starting test: Connectivity
The host 0888502e-bb3b-4d29-b08e-eee8616e1d0d._msdcs.docencia.ucr.ac.cr
could not be resolved to an
IP address. Check the DNS server, DHCP, server name, etc
Although the Guid DNS name
(0888502e-bb3b-4d29-b08e-eee8616e1d0d._msdcs.docencia.ucr.ac.cr)
couldn't be resolved, the server name (server.docencia.ucr.ac.cr)
resolved to the IP address (10.3.18.2) and was pingable. Check that
the IP address is registered correctly with the DNS server.
......................... SERVER failed test Connectivity

Doing primary tests

Testing server: Default-First-Site-Name\SERVER
Skipping all tests, because server SERVER is
not responding to directory service requests

The processing of Group Policy failed. Windows could not obtain the name of a domain controller. This could be caused by a name resolution failure. Verify your Domain Name Sysytem (DNS) is configured and working correctly.

También hay otros referentes a NETLOGON:

The dynamic registration of the DNS record 'docencia.ucr.ac.cr. 600 IN A 10.3.18.43' failed on the following DNS server:

The Security System detected an authentication error for the server DNS/server.docencia.ucr.ac.cr. The failure code from authentication protocol Kerberos was "There are currently no logon servers available to service the logon request.
(0xc000005e)".

O también este:

The Key Distribution Center (KDC) cannot find a suitable certificate to use for smart card logons, or the KDC certificate could not be verified. Smart card logon may not function correctly if this problem is not resolved. To correct this problem, either
verify the existing KDC certificate using certutil.exe or enroll for a new KDC certificate.

Visor de eventos del ADDS:

Aquí veo solamente algunos Warnings de este tipo:

The security of this directory server can be significantly enhanced by configuring the server to reject SASL (Negotiate, Kerberos, NTLM, or Digest) LDAP binds that do not request signing (integrity verification) and LDAP simple binds that are
performed on a cleartext (non-SSL/TLS-encrypted) connection.

Y un error de este tipo:

Active Directory Domain Services was unable to establish a connection with the global catalog.

Additional Data
Error value:
1355 The specified domain either does not exist or could not be contacted.
Internal ID:
3200d50

The host 0888502e-bb3b-4d29-b08e-eee8616e1d0d._msdcs.docencia.ucr.ac.cr
could not be resolved to an
IP address. Check the DNS server, DHCP, server name, etc
Although the Guid DNS name
(0888502e-bb3b-4d29-b08e-eee8616e1d0d._msdcs.docencia.ucr.ac.cr)
couldn't be resolved, the server name (server.docencia.ucr.ac.cr)
resolved to the IP address (10.3.18.2) and was pingable. Check that
the IP address is registered correctly with the DNS server.
......................... SERVER failed test Connectivity

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